Lab One – Diffusion and Osmosis SECTION ONE: Methods Lab 1 – Diffusion and Osmosis can be broken down into four parts (A‚ B‚ C‚ and D). Lab 1A – Diffusion In this exercise‚ we tested diffusion through dialysis tubing. This was done through a demo with the teacher‚ rather than individually in groups. First‚ a piece of 2.5cm dialysis tubing was obtained. Then one end was folded and clipped securely so that a solution poured into the bag would not leak out. Next‚ the other side of the bag was
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The effect of molecular weight on the diffusion rates of Potassium permanganate (KMnO4)‚ Potassium dichromate(K2Cr2O7) and Methylene Blue^1 _________________ Group 3 Sec. X-1L February 6‚ 2012 ____________________ ABSTRACT The effect of molecular weight on the diffusion of substances were tested through the use of agar-water gel with three wells placed in a petri dish. Drops of three different substances namely: Potassium
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The relationship between shape and diffusion rate Aim- To investigate the relationship between the shape of an object and the time taken for a substance to diffuse to its centre. Hypotheses- Part A) The 5x5x2.5mm block will turn clear first as the Surface area to volume ratio is high and the 10x10x10mm block will take the longest to completely diffuse the Acid to its centre. Part B) The flat‚ rectangular block will be the first to completely turn clear due to its high Surface Area/Volume Ratio
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cell membrane. The cell Membrane is a thin protective coating around a cell that regulates what goes in and out of the cell. An important part of regulating this is passive transport. Passive transport is the movement of materials through membranes without any input of energy. One type of passive transport is diffusion. Passive transport is the diffusion of substances across a membrane. In diffusion‚ molecules will usually move from where the substance is more concentrated to where it is less
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believe that these are more than just tales; they believe that that the Bible is fact. The majority of people in the world who have had an education believe that a major flood happened that have shaped the world into what it is today. The evidence of the flood can prove that the biblical story is indeed fact. In Genesis‚ God explains how a flood occurred because of the evil in the world. God was protecting His people by having a “new start”. The flood lasted for over a year‚ destroying people‚ animals
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Diffusion Introduction Diffusion is the net movement of ions or molecules from a region of high concentration to a region of low along the concentration gradient until equilibrium has been reached. The steeper the gradient the faster the rate of diffusion. There are a few types of diffusion. Three (3) of those are: Facilitated Diffusion- refers to diffusion of substances across a cell membrane with the help of transport protein. Dialysis- refers to the diffusion of solutes across a semipermeable
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What Happened To the Hummer? Shawn Morris Wright Career College Mr. Burney EN102 – English Composition April 7‚ 2011 The HMMWV‚ pronounced Humvee‚ short for High Mobility Multipurpose Wheeled Vehicle‚ which went into preliminary design work in 1979‚ was intended as a mobile transport vehicle for American troops. (Burkeman‚ 2008) It gained popularity among civilians as support for the military grew. Versions of the Humvee‚ called the Hummer went into production for the general
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This morning‚ my daughter asked me what happened to the dinosaurs. "Why did they disappear?"‚ she asked while I was fetching her to school. Her teachers had told her that the dinosaurs disappeared millions of years ago after changing to other animals. She is six years old. The theory of evolution is increasingly being accepted as fact and taught to children as young as preschool. It is everywhere; in movies‚ in cartoons‚ at school‚ and even‚ in music classes. Children shows such as "Go‚ Diego‚ Go
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What happened in Enron and Arthur Andersen? United States ’ seventh largest company Enron‚ with the slogan "Ask Why" was admired for its innovation‚ but it all ended up in bankruptcy and criminal matters. The company filed for bankruptcy in December 2001. This was one of the world ’s biggest corporate scandals in history. USA ’s seventh largest firm had in over sixteen years increased its assets from 10 billion to 70 billion U.S. dollars‚ and was by the stock market analysts from Wall Street
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Diffusion is the process by which a particular phenomenon --- such as a contagious disease‚ a technological innovation or even an idea --- is spread from person to person over a period of space and time. One method of diffusion is known as expansion diffusion‚ which is broken down into three distinct types. Expansion Diffusion * Strictly defined‚ expansion diffusion is the process of spreading something from one place to another in an ever-expanding "snowballing" process. Expansion diffusion
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